JPH07198300A - Fireworks - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide fireworks with a high ornamental value by keeping the flying objects such as explosive balls in the air for a long time to enjoy. [Structure] This fireworks is a firework consisting of a tubular body, explosives, and projectiles. , Is arranged above this injection port. The tubular body 2 is made of cardboard or the like and includes a first portion 21 and a second portion 22. The first portion 21 is filled with the explosive 3, and its upper opening serves as the injection port 4. The flying body 5 is accommodated in the second portion 22. Then, the squib 6 is drawn out from the injection port 4 of the first portion 21 through the second portion 22.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to fireworks.

[0002]

2. Description of the Related Art FIG. 4 shows the structure of a general conventional launch fireworks 10. This fireworks display 10 has a cylindrical body 11.
In the inside, a gunpowder ball 12 which is a projectile to be launched and a gunpowder 13 for launching are loaded. Since the explosive ball 12 and the explosive powder 13 are arranged inside the tubular body 11, the explosive ball 12 is naturally selected to have a size slightly smaller than the injection port 14 of the tubular body 11. And
When watching the launch fireworks 10, the squib 15 is ignited, the launch powder 13 is ignited, and the explosive force causes the explosive ball 12 to fly into the air.

[0003]

However, in this conventional launch fireworks, the expelled explosive ball flies away in a single time while drawing a parabola, and the time for viewing is short, and the explosive ball Since it flies away in the distance, there is a problem that the ornamental value is low.

Therefore, an object of the present invention is to solve such a problem and to provide a fireworks having a high ornamental value by keeping a flying object such as an explosive ball long in the air and having a long ornamental time.

[0005]

A fireworks according to the present invention is a firework consisting of a tubular body, an explosive and a flying body, wherein the tubular body is loaded with the explosive, and the It is characterized in that the flying body selected to have a large size is arranged above this injection port.

[0006]

The present invention has been devised so that the flying body arranged above the ejection port of the cylindrical body is selected to have a size larger than that of the ejection port in the cylindrical state, and the surface area of the flying body becomes large. Because of this, a jet of explosive powder that has ignited is sufficiently added to the projectile,
Sufficient lift is obtained for the flying object to stop in the air.

[0007]

As described above, according to the present invention, it is possible to provide a fireworks with a high ornamental value by keeping a flying object such as an explosive ball in the air for a long viewing time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic sectional view showing a firework 1 according to the present invention. The tubular body 2 is made of cardboard or the like as in the conventional case, and has a first portion 21 and a second portion 22. In this embodiment, the first portion 21 and the second portion 22
And are integrally formed to form the tubular body 2. First part 2
1 is filled with explosive 3, and its upper opening serves as an injection port 4. The flying body 5 is housed in the second portion 22. And the squib 6 is the injection port 4 of the first portion 21.
Through the second portion 22 to the outside. The flying body 5 accommodated in the second portion 22 is formed of a spherical hollow body having a diameter larger than that of the injection port 4 of the first portion 21, and is formed by, for example, Styrofoam or the like. A reinforcing film 51 for enhancing heat resistance is formed on the outer surface of the flying body 5, and is formed of, for example, a metal foil or a ceramic film. Further, an explosive film 52 is formed on the surface of the reinforcing film 51. The explosive film 52 has a single-layer structure or a multi-layer structure, and in particular, by forming the multi-layer structure by using different kinds of explosives, the emission color can be changed. Further, the explosive film 52 does not need to be formed on the entire surface of the projectile 5, and can be partially formed as necessary.

The state of use of the firework 1 having the above structure will be described below. First, the squib 6 is ignited to ignite the explosive 3 loaded in the first portion 21, and a jet of explosive is generated from the injection port 4 of the first portion 21. The projectile 5 receives this jet flow and jumps out into the air, but the force received from the jet becomes weaker as it moves away from the jet port 4, and eventually balances with the gravity applied to the projectile 5 and stops in the air at that position. This usage state is shown in FIG.

Here, the flying body 5 is not limited to the vertical direction,
Stable in the air even in the horizontal direction. This is because when the projectile 5 tries to move outward from the central axis side of the jet in the horizontal direction, the speed of the jet applied to the projectile 5 is slower on the outer side than on the central axis side as shown in FIG. Due to the lower atmospheric pressure on the central axis side (Bernoulli's theorem), a force F for returning the projectile 5 to the central axis side is generated.

[0012] And, the flying object 5 which is stably stagnant in the air
An explosive film 52 is formed on the surface of, and the projectile 5 emits light in the air when the explosive film 52 is ignited by the jet of the explosive 3. At the same time, the explosive film 52 is formed of the metal foil 51.
The heat resistance of the projectile 5 is increased because it is formed through the
The shape of is maintained.

The present invention is not limited to the above-described embodiment, but may be appropriately changed in shape such as a cylindrical body or a flying body. For example, it is naturally possible to form the cylindrical body as a prism and the flying body as a polyhedron. Furthermore, in the flying body,
It is also possible to give decorations such as feathers.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic view showing a usage state of the fireworks according to the present invention.

FIG. 3 is a principle diagram for explaining a stopped state of a flying object.

FIG. 4 is a schematic cross-sectional view showing a conventional fireworks display.

[Explanation of symbols]

 1 Fireworks according to the present invention 2 Cylindrical body 3 Explosive 4 Injection port 5 Flying body 6 Fuze

Claims (1)

[Claims] 1. A fireworks consisting of a tubular body, an explosive and a flying body, the tubular body being loaded with the explosive, and the flying body selected to have a size larger than the ejection port of the tubular body. Fireworks characterized by being placed above the mouth.